Datex-Ohmeda Anesthesia Delivery Unit S/5, Technical Reference Manual

Page: 274 / 494

Datex-Ohmeda ADU
B-48
Document No. 8502854
Agent flow calibration
This calibration calibrates the cassette flow sensor. The calculation is divided in two parts, one
second order and one linear calculation. The calibration factors for the safety limit calculation for the
agent proportional valve are also calibrated. The calibration factors are stored in EEPROM 25-29.
During this calibration the EEPROM 45 value is zeroed and it is calibrated at the first agent delivery
check after the calibration.
Equipment needed: Calibrated anesthesia monitor (Capnomac Ultima or
S/5 Anaesthesia with gas module can be used)
Filled enflurane or sevoflurane cassette
Settings: ADU On
Pipeline gases connected
Manual mode
APL valve set to 1.5 cmH
2
O
No gas flows
Scavenging On
Figure 46 Agent flow calibration
1. Push the Setup key. Select install and enter the distributor password. Select Install - User
Config - Ambient pressure.
Select
Ambient pressure
and give external air pressure (see the
chart below). The first row shows the height above sea level (meters) and second row shows the
atmospheric pressure:
2. Select
Service
and enter the calibration password. Check that all other calibrations are done
(see calibration tree in the beginning of this chapter). Then select Calibrations - Vaporizer -
Agent flow.
Height (m) 0 200 400 600 800 1000 1200 1400 1600
Pressure (mbar) 1013 988 964 940 917 894 872 850 829
Height (m) 1800 2000 2200 2400 2600 2800 3000 3200 3400
Pressure (mbar) 809 789 769 750 732 714 696 679 662